Have started building a new experimental Drum bot, modular design with drive module similar to Rat’s only with a third red wheel mounted above and between the powered drive wheels to make it invertible.
The weapon pivots off the centre shaft of the drive bogies and can be quickly changed.
The weapons will be drums of different design; I wont to be able to experiment without building a new bot each time.
I am interested in small diameter high-speed high torque reasonably wide designs that might be effective in getting under opponents reliably
Wed Apr 19, 2006 10:25 am
Rotwang Experienced Roboteer
Joined: 15 Jun 2004
Posts: 1589
Location: Vic
Took me a while to think through the sportsman class, probably shouldn’t beat myself up too much as I have been a bit distracted for a decade with some other things.
However I now find myself with a little time to think robot thoughts and sort through a lot of bot parts that have been moved buried in peat bogs and recycled as fire lighters by people other then myself.
Possibly slight exaggeration there but with sons moving back and forth accompanied by GF’s cats and dogs plus the possums totally taking over the shed the effect is somewhat similar.
I have been retreating indoors from the cold and dark. Trying to be productive, organizing various things bots included.
On to Roller and the sportsman class.
Apart from admittedly unavoidable rubbery KE weapon weight RPM saw blade token weapon sitch that the EO will have to deal with all good.
Lots of Ideas bubbling around for new bots and reworking old ones to fit.
One that I think is suitable for the sportsman comp is Roller; small diameter wide low rev bi directional high torque low mass drum with the invertible drives that I think was originally going to be part of Ballistic until we ran out of weight points.
4 drills 6 red wheels. Probably a drill with gearbox, chain drive drum. 6 A123
Self imposed limitation is no building any new designs until I finish various other commitments but I am allowing myself a little time to reassemble existing bots Roller just qualifies. _________________ Satisfaction is proportional to effort and results.
Unmodified saw blades <250mm are allowed at any RPM. Sparks are good for show plus can always take on some of the exposed wheels. A little token yes and probably not going to win you the competition but IMO as an EO simple, reliable and a crowd pleaser.
As for other spinning weapons you are limited to 400RPM. Nobody has really tested the limits of the High Mass/Inertia limits as of yet. Feel free to be the first. At this stage I impose no limits however if your weapon mass is greater than 1/3 of your robot please check with me before coming to an event if I am EO.
I find it a little hard to picture what 400rpm is. I cordless drill is what about 300rpm. I think you can still probably do damage but nothing like we see in the open class. I remember back to my first robot swinging a few KG of axes on a drill. It had a 1m radius and was scary but it wouldn't put a dent in anything these days. _________________ Steven Martin
Twisted Constructions
http://www.botbitz.com
Wed Aug 12, 2015 10:23 pm
Jaemus Experienced Roboteer
Joined: 01 Apr 2009
Posts: 2674
Location: NSW
Nothing like a 9 year and 4 month thread revival
Looking forward to seeing Roller and someone from Victoria competing again _________________ <Patrician|Away> what does your robot do, sam
<bovril> it collects data about the surrounding environment, then discards it and drives into walls
Thu Aug 20, 2015 4:32 pm
Rotwang Experienced Roboteer
Joined: 15 Jun 2004
Posts: 1589
Location: Vic
Might be why the TX batteries are flat.
Thinking about which way to go.
Try and get something started down this way or resign myself to traveling and hope someone holds an event somewhere.
Been reading lots of the threads trying to catch up with what’s been going on.
Not really interested in ants and beetles. _________________ Satisfaction is proportional to effort and results.
Couple of thing I have decided are re assembles as many of our old bots as possible.
Partly I just like to have them together and working and partly if an opportunity to put on some sort of demo or other arises their good to go.
Sorting out some bots for the curent feather and sportsman class.
Gen4 Bender? _________________ Satisfaction is proportional to effort and results.
Fri Aug 21, 2015 12:13 am
andrew
Joined: 16 Jun 2004
Posts: 3110
Location: Castle Hill, Sydney. N.S.W
bender for feather and mini mower for sportsman would still do well today
Im blatatnly ripping off mini mower for new sportsman _________________ Andrew Welch, Team Unconventional Robotics
Fri Aug 21, 2015 12:52 am
Philip Experienced Roboteer
Joined: 18 Jun 2004
Posts: 3842
Location: Queensland near Brisbane
I think that a full width drum is outside the intent of the sportsmen rules. It would be very effective though. _________________ So even the rain that falls isn't actually going to fill our dams and our river systems
Fri Aug 21, 2015 3:21 am
Rotwang Experienced Roboteer
Joined: 15 Jun 2004
Posts: 1589
Location: Vic
With the number of VD’ s of one sort or another Benders tire armor could be a problem.
Works brilliantly against horizontals though.
Thinking spring steel if I can do it in the weight.
I remember that aluminum on the back of one of your horizontals’ didn’t work. _________________ Satisfaction is proportional to effort and results.
Fri Aug 21, 2015 5:13 am
Rotwang Experienced Roboteer
Joined: 15 Jun 2004
Posts: 1589
Location: Vic
Rollers drum is progressing, raining again and stooping me from doing things I should be doing.
One of those obvious ideas that everyone thinks of is putting the drum drive motor inside the drum.
With the limited rpm combining with the limited KE capability's of sportsman opponents I think I can make it work. _________________ Satisfaction is proportional to effort and results.
Sat Oct 01, 2016 3:39 pm
miles&Jules Experienced Roboteer
Joined: 19 May 2010
Posts: 3973
Location: ipswich QLD
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